We try hard to maintain backward compatibility as much as possible, but unfortunately it can’t always be done. If you recently upgraded to 4.5.42a you may have noticed that scraping sessions that are exported from that version don’t import correctly into an alpha version prior to it. This was a result of the alterations to the “tidy HTML” functionality that were implemented in that version. As such, this is one case of backward-compatibility where you’re going to have to be careful. As of this version (and later versions) if you export scraping sessions from screen-scraper you should only import them into instances of screen-scraper also running version 4.5.42a or later. Unfortunately, this is one case where it was impossible to maintain the compatibility with older versions, so please take note.